Monkey-wrench.



PATENTED OCT. 25, 1904.

L. H. SCHBPMAN.

MONKEY WRENCH.

APPLIGATION FILED DBO. 21, 1903.

N0 MODEL.

N fj. mob( pf )H9 L J Patented October 25, 1904.

Trice.

LOUIS H. SOHEPMAN, OF RICHMOND, INDIANA.

MONKEY-WRENCH.

SPECIFICATION forming part of Letters .Patent No. 773,229, dated October25, 1904.

Application filed December 2l, 1903. 'Serial No. 185,937. (No model.) l

To all whom imag concern.-

Be it known that I, LOUIS H. SCHEPMAN, a citizen of the United States,residing in the city of Richmond, in the county of Wayne and State ofIndiana, have invented certain new and useful Improvements inMonkey-Vrenches, of which the following is a complete specification,which when taken in connection with the accompanying drawings, forming apart thereof, will be found sufficiently clear and concise as to enableothers skilled in the art to which it appertains to make and use thesame.

My present invention does not contemplate a radical departure from theprinciples heretofore involved in devices of this general-character, butrather the adoption of well-known principles with their mechanicalelements reduced to their simplest propositions and as a naturalsequence accentuating the utilitarian residual benefits and adaptingthem to subserve the highest economic ends with a minimum of mechanicalelements.

The object of my present invention, broadly speaking, is to provide awrench composed of coperating interdependent, and subsidi-ary mechanicalparts arranged and combined to produce the highest degree of eiiiciency.

Amore specific object is to provide a wrench capable of quick andpositive adjustment to a great variety of nuts or the like; to provide awrench composed of the fewest possible number of parts; to provide awrench that will be neat and attractive in appearance and capable of awide scope of usefulness and efficiency; to provide a wrench which maybe adjusted to any desired span of the jaws with a single hand of theoperator and that in an instant of time; to generally improve theconstruction and operation of wrenches of this character, and to providean adjustable wrench which can be manufactured and sold at acomparatively low price.

Other objects and advantages of my invention will appear from thefollowing detail description and .from the drawings forming a partthereof and as specifically set forth in the terminal claims.

This invention consists in an adjustable wrench embodying certain newand useful features and details of construction and relative dispositionof the several parts, substantially as particularly described elsewherein this specication and in the legitimate combinations herein set forth.

In order to make the construction and operation o'f my wrench moreclear, I will now take up the detail description thereof, which I willrefer to as briefiy and compactly as I may.

One manner of carrying out the objects of my invention in a practicalmanner and that which in practice I have found the most desirable isillustrated in the accompanying drawings, in which- Figure lis a sideelevation of my entire invention complete. Fig. 2 is a longitudinalcentral section of same, taken on the line Y Y of Fig. 8. Fig. 3 is atop plan view of same. Fig. 4 is a cross-section of same taken on theline X X of Fig. 1, and Fig. 5 is a detail isometrica] view of thehanger for the forward end of the screw-shaft thereof.

Similar' indices refer to and denote like parts throughout the severalviews of the drawings.

In the accompanying drawings the indice A denotes thebody-bar,rectangular in cross-section, having on its forward end thefixed head A integral therewith andan integral handlebar a, of lessdiameter and 0f substantially same length, extending to the rear inalinement therewith and having a screw-thread on its free end'.

The letter B denotes the removable substantially round handlesurrounding the handlebar a and adapted to be secured by the round nutI), abutting thereagainst and coincidingly threaded to said threaded endof the handlebar a, substantially as shown.

The indice Odenotes the breast-step,which is of greatery diameter thanis the bar A and is adapted to abut thereagainst and surround the bar A.An integral lug portion c, opposite the inner lower face of the jaw A',eX- tends down from the breast-step and' has-a bearing-cavity in itsface to provide an axlebearing for the rear end of the shaft G,hereinafter referred to.

rIhe indice E denotes a movable jaw; E, a follower therefor and somedistance therefrom and connected integrally therewith by the camber E"and adapted to slide on the IOO @mit

body-bar A, to which bar said parts are slidably connected by the loopsa and a', as shown. The channel formed for the bar A through the membercomposed integrally of the jaw E, the follower IU, the camber Il, andthe loops c and e is of a size at its forward end only slightly greaterthan the diameter of said bar, while the upper edge thereof slopesupward and rearward, whereby the size of said channel at its rear issomewhat greater vertically than at its forward end, as indicated inFig. 2, the purpose of which will presently appear.

Secured in the center of the under side of the bar A, slightly forwardof itslength, is a screw-eye hanger H, threaded into said bar, as shown,and providing a pivotal bearing for the forward end of the shaft G. Thesaid shaft is provided with a pivot on both its forward and rear ends,as shown, and operative revolubly in the respective bearings referredto, and integral with said shaft G, immediately forward of the rearpivot, is a knurled rosette by which the shaft G may be manuallyrotated, and the periphery of said shaft between the forward pivot andthe said rosette is provided with square spiral threads G, as indicated.

As apparent, a cavity is formed in the follower IC and camber E belowthe bar A, opening only to the rear and of a length such that when thefollower impinges the rosette (1" the forward end will impinge (ornearly so) the hanger H. rIhe lower inner face of said cavity is of suchcontour or curvature as the periphery of the threads of the shaft G, andsaid curved portion provided with square threads E, corresponding withand adapted to engage the threads Gr, above rcferrcd to.

Secured by a rivet EZ on top of the loop or on the loop r is a flatspring I, projecting toward the opposite loop and having its free endresting resiliently on the upper surface of the bar A, by which thethreads Gr and E are normally kept in engagement with each other.

Operation: It will now be apparent that the movable jaw E may be movedback and forth in the usual manner by revolving the rosette G, or, moreparticularly, the jaw E may be moved back and forthinstantaneously bydisengaging the threads E from the threads GA--that is to say, bypressing down on the loop e'. From the above it will be seen that bypressing down on the loop e the movable jaw may be quickly slid. back toallow the jaws to span a n ut and then instantly brought into engagementwith the two sides thereof, then by releasing the pressure on the loop ethe threads IC will engage the threads G', and then to make theadjustment on the nut more positive the rosette G' may be turned untilthe two jaws are brought tightly in contact with the nut, and therelease from the nut may evidently be made by the reverse operation.

From the above description, taken in connection with the accompanyingdrawings, it will be made manifest that I have produced an improvedwrench embodying the objects referred to previously herein.

Thile I have illustrated and described the best means known to me forcarrying out the objects of my invention in a practical manner, I desirethat it be distinctly understood that I do not restrict myself to theexact details of construction shown and described, but hold that anyslight changes or variations or changes therein as would suggestthemselves to the ordinary mechanic would clearly .fall within the limitand scope of my invention.

The terms back and forth, Lupper, lowcn and other similar terms are usedfor convenience of description only, and it is not intended bythe use ofsuch terms to limit the arrangement and operation of the several parts,but rather to indicate their relative location and operation in thisinstance.

Having now fully shown and described my invention, what I claim, anddesire to secure by Letters Patent of the United States, is

In a monkey-wrench, the combination, a body-bar havinga fixed head, ahandle, and a breast-step; a member slidable on said bar between saidhead and breast-step; said member consisting` of a movable jaw adaptedto engage the face of the fixed jaw, a follower to approach thebreast-step, a eamber integrally uniting said movable jaw and thefollower, and loops extendingfrom the movable jaw and from the followerover said bodybar; threads formed on the lower curvature of inner faceof the follower and the camber; a screw-eye hanger threaded into andextending down from the under side of the bodybar into the chamberformed in the camber and the follower and continuously inclosed thereby;a threaded shaft pivoted at one end in said screw-eye hanger and pivotedat the other end in said breast-step; a rosette adjoining saidbreast-step and formed integral with said shaftra spring secured at oneend to the center of the upper surface of one of said straps with itsfree end resting on the upper surface of the body-bar; means foractuating' the movable jaw by revolving said rosette; and means forsliding the movable jaw after disengaging it from the threads of saidshaft by pressing down against the force of said spring, allsubstantially as shown and described.

In testimony whereof I have hereunto signed my naine to thisspecification in the presence of two subscribing witnesses.

LOUIS H. SCHEPMAN. lVitnesses:

R. WV. HANDLE, R. E. HANDLE.

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